Show HN: Fusebox – get emailed before an OpenAI API bill runs away

Category: devtools

Tags: openai, cost-monitoring, alerts, saas, api-usage

Score: 4.3/10 (Innovation: 4, Technical: 3, Documentation: 5, Utility: 6)

Fusebox is a lightweight SaaS that monitors OpenAI API usage and emails users when they approach a self-set monthly spending ceiling. It offers a free tier with alerts only at 100% and a paid tier ($7/mo or $29 lifetime) for early warnings at 50% and 80%. The key differentiator is its security-first approach: it asks for a scoped OpenAI Admin key with only api.usage.read permission, ensuring it can never spend money or access sensitive data.

Target audience: backend devs, indie hackers, small teams using OpenAI API

Repository: https://fusebox.sifatsrk.workers.dev/

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